Thick film resistor compositions

Details Thick film resistor compositions Thick film resistor compositions

1994-09-22

1995-12-12

Lieberman, Paul

Compositions

Electrically conductive or emissive compositions

Metal compound containing

252521, 106 125, 106 128, H01B 100, H01B 106, H01B 108

Patent

active

054747112

ABSTRACT:
To provide a thick film resistor involving small variations in resistance and TCR during the firing step and a low thermal coefficient of expansion. A thick film resistor composition containing 5-30 wt. % of a ruthenium pyrochlore oxide and 10-90 wt. % of a glass binder, wherein (1) the ruthenium pyrochlore oxide is PbRuO.sub.3, (2) the glass binder is a glass which contains a first glass containing 61-85 wt. % of PbO, 10-36% of SiO.sub.2 and 0-2 wt. % of B.sub.2 O.sub.3, the total content of the PbO, SiO.sub.2 and B.sub.2 O.sub.3 accounting for 95 wt. % or more of the first glass, and in which 2-20 wt. % of B.sub.2 O.sub.3 is contained in the entire glass binder, and (3) the first glass accounts for 5-30 wt. % of the thick film resistor composition, and the weight ratio of the ruthenium pyrochlore oxide to the first glass is 5:30-60:40.

REFERENCES:
patent: 4302362 (1981-11-01), Hoffman et al.
patent: 4476039 (1984-10-01), Hormadaly
patent: 5096619 (1992-03-01), Slack
Patent Abstracts of Japan, vol. 15, No. 121, Mar. 25 1991.

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